83 birds are sitting on a tree. 18 of them flew away. How many birds will be left on the tree?
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My brother lost 2 pebbles out of the 90 pebbles he collected from the river. How many pebbles are left with my brother?
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Ray has 31 dollars more than Laura. Laura has 98 dollars. How many dollars does Ray have?
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Jonathan has 81 marbles. He gave 43 marbles to his dad. How many total marbles are left with Jonathan?
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Harry has 82 crayons. 41 of them are in the green box and the others are in the red box. How many crayons are in the red box?
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